高压气井用双相不锈钢的组织特征和耐蚀性
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摘要
采用金相显微镜、高温高压腐蚀试验和标准点蚀及缝隙腐蚀试验,研究了UNS S32205和UNS S32750两种双相不锈钢的多相组织特征和在模拟气田腐蚀环境中的腐蚀行为;并采用X射线能谱仪、X射线衍射等技术和X射线光电子能谱分析了表面钝化膜。结果表明,两种双相不锈钢均有近等比例的铁素体(α)相和奥氏体(γ)相,具有较好的耐均匀腐蚀和局部腐蚀性能,但UNS S32750钢的耐腐蚀性能优于UNS S32205钢,而后者产生了轻微的局部腐蚀,局部腐蚀速率在可接受范围内。
The microstrueture and corrosion behavior of duplex stainless steels UNS S32205 and UNS s32750 were studied by microscopy,high tempercture and high pressure(HTHP)test,pitting corrosion test and crevice corrosion test.The passive film was flnalyzed by energy dispersive X-ray spectrometer,X-ray diffraction and X-ray photoelectron spectroscopy.The results showed that these two steels had nearly equal proportion double phases of αferrite and γ-austellite,uniform corrosion and localized corrosion peHormance of the two duplex staimess steels were welL The corrosion resistance of UNS s32750 steel is better than UNS S32205 steeL The localized corrosion rate of UNS S32205 steelis acceptable.
The microstrueture and corrosion behavior of duplex stainless steels UNS S32205 and UNS s32750 were studied by microscopy,high tempercture and high pressure(HTHP)test,pitting corrosion test and crevice corrosion test.The passive film was flnalyzed by energy dispersive X-ray spectrometer,X-ray diffraction and X-ray photoelectron spectroscopy.The results showed that these two steels had nearly equal proportion double phases of αferrite and γ-austellite,uniform corrosion and localized corrosion peHormance of the two duplex staimess steels were welL The corrosion resistance of UNS s32750 steel is better than UNS S32205 steeL The localized corrosion rate of UNS S32205 steelis acceptable.
引文
[1]吕详鸿,赵国仙,张建兵,等.超级13Cr马氏体不锈钢在CO_2及H_2S/CO_2环境中的腐蚀行为[J].北京科技大学学报,2010,32(2):207-211.
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[9]郭绪镇,董飞,李镜银,等.双相不锈钢磨损腐蚀的机理及强化途径[J].材料开发与应用,2010.25(3):8487.
[10]Robert Mack.Stress corrosion cracking of a cold worked 22Cr duplex stainless steel production tubing in a high density clear bring CaCl_2 packer fluid[C]//Corrosiom 2002.[s.l.]:[s.n.],2002:2067.
[11]韩燕,赵雪会,白真权,等.不同温度下超级13Cr在Cl~-/CO_2环境中的腐蚀行为[J].腐蚀与防护,2011,32(5):366-369.
[2]林冠发,相建民,常泽亮,等.3种13Cr110高温高压??CO_2腐蚀行为对比研究[J].装备环境工程,2008,5(5):1-4.
[3]张国超,林冠发,孙育禄,等.13Cr不锈钢腐蚀性能的研究现状及进展[J].全面腐蚀控制,2011.25(4):1620.
[4]姜放,曹晓燕,施岱艳,等.双相不锈钢在油气工业中的工程应用[J].天然气与石油,2011,29(3):58-62.
[5]高娃,罗建民,杨建君.双相不锈钢的研究进展及其应用[J].兵器材料科学与工程,2005,28(3):61-64.
[6]屈金山,王元良.双相不锈钢焊接接头的耐腐蚀性能[J].中国有色金属学报,2001,11(4):197-201.
[7]吴玖.双相不锈钢[M].北京:冶金工业出版社,1999.
[8]付永宏,鲍崇高.耐腐蚀冲蚀的双相不锈钢研究与应用[J].铸造技术.2009,30(8):1002-1005.
[9]郭绪镇,董飞,李镜银,等.双相不锈钢磨损腐蚀的机理及强化途径[J].材料开发与应用,2010.25(3):8487.
[10]Robert Mack.Stress corrosion cracking of a cold worked 22Cr duplex stainless steel production tubing in a high density clear bring CaCl_2 packer fluid[C]//Corrosiom 2002.[s.l.]:[s.n.],2002:2067.
[11]韩燕,赵雪会,白真权,等.不同温度下超级13Cr在Cl~-/CO_2环境中的腐蚀行为[J].腐蚀与防护,2011,32(5):366-369.